Multiple-spindle screw-machine.



Patented Feb. 27, I900.

L.' C. WOERNER &'F. HARRINGTON.

MULTIPLE SPINDLE SCREW MACHINE.

(Application filed Sept. 2, 1898) 4 Sheets-Sheet I.

(No Model.)

Witnasasy lnwiziony" (I. Woerner AP H'urnlnyian,

TH: Nunms PETERS co. Pho'rquma. wn snmcran. 0. i;

N0. 644,3l0. Patented Feb. 27, I900. L. C.- WOERNER & F. HARRINGTON.

MULTIPLE SPINDLE SCREW MACHINE.

(Application filed Sept. 2, 189B.)

4 Sheats-Sheet 2,.

(Nq'ModeL) Inventon! Witnesses;

woerner a;

THE Noam PEYERS 00.. P

N o. 644,3|0. Patented Feb. 27, I900.

' L. C. WDERNER &. F. HARRINGTON.

MULTIPLE SPINDLE SCREW MACHINE I (Application filed Sept. 2, 1898.) IiNu Modem 4 Sheets-Sneet 3v me NGRBIS wzTEas co.. womuwm, WASHINGTON. u,c

,3"). Patented Feb. 27, I900.

L. C. WUERNER 8:. F. HARRINGTON. MULTiPLE SPINDLE SCREW MACHINE(Application filed Sept. 2, 1398. (No Model.) 4 Sheets-Sheet 4,

mmmummgg s mi n gm mmmrf y, 3 6

THE NORRIS PETERS 00 PHOTO-LITNO.. wnsnlmnrum n. c.

- UNITED STATES PATENT OFF CE.

LOUIS 'c. WOERNER AND FRANK HARRING ON, or HARTFOR ooNNEoTI- OUT,ASSIGNORS TO THE PRATT & WHITNEY COMPANY, or SAME PLACE;

MULl'IPLE-SPINDLE sotiEW-MAoHm.

SPECIFICATION formingpart of Letters Patent No. 644,310, dated February2a, 1966.

Application filed Sept'enihei'2,1898. Serial No. 690,086. (No model.)

To all whom it may conceive:

Be it known that we, LOUIS O. VVOERNER and FRANK HARRINGTON, citizens of.the United States, residing at Hartford, in the county of Hartford andState of Connecticut, have invented certain new and useful Improvementsin Multiple-Spindle Screw-Machines, of which the following is aspecification.

This in vention relates to metal-working machines, and it is embodiedespecially in an automatic multiple-spindle machine or lathe for formingscrews and other similar articles from rods of-the usual type.

One of the main features of this invention is the provision of improvedturret mechanism for holding and advancing to and withdrawing from aworking position the tools usually carried by the turret in a machine ofthis kind. One of the essential features of this part of the inventionis the employment in connection with a turret of a reciprocatoryactuating device for rotating the same, this actuating devicebeingoperated in turn by automatic actuating means-such, for example, as theusual cam-shaft of a machine of this type. In addition to theturret-rotating device and in connection therewith a locking device forthe turret is also employed, which coacts with such rotating device andmay also be operated automatically in a manner similar to the operationjust described with respect to the reciprocatory turret-rotating member.

One of the principal features which distinguishes the construction shownin the present application is the automatic operation of the turretrotating and locking devices, which action willbe described more fullyhereinafter 'in detail.

Another important feature of this invention is the provision of a turret-rotat-ing device supported and operable independently of thelocking device, separate actuators being provided, preferably, for thepurpose of shifting these parts into and out of action. Hence in thepreferred construction each of these devices is reactive in onedirection, a spring being employed in this case for normally holding thelocking device in or forcing it toward its lockin g position,whileanother spring tends normally to return the turret -rotating devicetoward the beginning of its range of movement, which in this case willbe in a di rection the opposite of the normal movement of thelockingdeviee. The usual construction will be one in which the turretwill be supported for rotation on a reciprocatory turretslide mounted inthe ordinary manner upon suitable ways, and the turret rotating andlocking devices will be carried by this turretslide and will bereciprocated relatively thereto, preferably by fixed actuators or stopscarried on the ways or support proper and inthe paths of movement of thelocking and turretrotating devices, respectively. The turret itself mayadvantageously be one having a substantially central peripherallyreduced portion forming two tool-receiving members at the upper andlower ends, respectively, of the turret, these two members or portionsof the turret having the usual tool-sockets for receiving tool-holdersof suitable construction, separate securing or fastening devices beingprovided for the tool-holders carried by each of these members'of theturret. It will be evident that by providing tool-holders and fasteningdevices of this type the holders of one series may be adjusted in placeor removed independently of those of the other series.

In a machine of the class in which the present improvements are embodiedit is customary to operate the several tools and other parts from arotary cam-shaft, and for the purpose of varying the rate of rotation ofthis cam and for correspondingly regulating the operation of the toolsand other parts controlled thereby we have provided in this case adriving-shaft carrying two pulleys so con- 0 nected with the cam-shaftas to be capable of rotating the latter at different rates of speed atdifferent stages in the operation. The preferred construction is one inwhich these two pulleys are rotated alternately by means of 5 a belt,which will be shifted from one to the other automatically at the properpoints by the action of a cam-wheel secured to the camshaft andcontrolling the movements of a belt-shipper of the usual type. Thetrans- 10o mitting means between the pulleys and the cam-shaft may be ofany suitable type to produce the requisite variation in the speed of thelatter, although we prefer to employ the epicyclic gearing illustratedherein. The movements of this cam-shaft will be transmitted to the toolsby mechanism which will be described fully in detail hereinafter. One ofthe mechanisms-that for operating the turning-down, cutting-off, orsimilar tools-- embodies in its construction an adjustable cam carriedby the cam-shaft and shiftable toward and from the latter, this camcooperating with suitable intermediate means or devices for regulatingthe extent to which the tool slide or slides are shifted. Preferably atleast two of these adjustable cams will be located on the cam-shaft, atopposite sides of the latter, and will determine the distance throughwhich the tool-slide moves in each direction. Another feature of thismechanism is a cam-wheel having a cam-groove controlling the movementsof the turret-slide, said slide having a depending arm carrying a shoewhich completely fills the space between the walls of the cam-grooves,and thus positively locates the turret-slide at any point in itsadvancing or retracting movement.

The foregoing and other features of novelty in theconstruction andorganization of the several mechanisms and devices of the improvedautomatic machine illustrated in the drawings of this application andforming the subject-matter of our present invention are fully set forthin the accompanying description.

In the drawings accompanyingandforming part of this specification,Figure 1 is a side elevation of an automatic machine embodying ourpresent invention. Fig. 2 is a plan of the same. Fig. 3 is a transversesection of the same, the section being taken substantially in line 3 3,Fig. 1. Fig. 4 is a transverse section of the same, the section beingtaken in line44, Fig. 1. Fig. 5 is an end elevation of the same as seenfrom the right in Fig. 1, parts being broken away to illustrate theconstruction more clearly. Fig. 6 is an enlarged longitudinal section ofone of the live-spindles of the machine and its connected parts. Fig. 7is an enlarged longitudinal section of the turret mechanism and coactingparts. Fig. 8 is a sectional plan of the turret, the turret-slide, andthe turret rotating and locking devices. Fig. 9 is a transverse sectionof the same, the section being taken in line 9 9, Fig. 8. Fig. 10 is apartial longitudinal section of the same,taken inline 1O 10, Fig. 8.Fig. 11 is a corresponding section taken in line 11 11, Fig. 8. Fig. 12is a detail view, partly broken away, of one of the cam-Wheels; and Fig.13 is a detail in section of manual means for actuating the rod feedingand holding devices.

Similar characters designate like parts in all the figures of thedrawings.

In a general way the construction and operation of the machineillustrated herein are in many respects similar to those of automaticmultiple-spindle screw-machines now in use. It embodies the usualcam-shaft, con tin uously rotative, for operating the different toolsand other parts of the machine, aheadstock carrying two or morecomposite livespindles carrying the usual rod feeding, chucking, androtating devices, a suitable tool slide or slides carrying theturning-down and cutting-off tools controlled in their movements by thecam-shaft, and a turret-slide, the latter of which carries the usualtools for drilling, tapping, countersinking, or otherwise operating inaccordance with the character of the parts to be made by the machine.

The several operative parts of the machine may be mounted substantiallyin the usual manner upon a framework, such as B, of the ordinaryconstruction. At one end thereof the turret support and the turret willbe mounted for operation, while at the other end the live-spindles orWork-spindles will be mounted on the head-stock of the machine, andbetween such head-stock and the turret will be supported the transverseslide carrying the turning-down and cutting-off tools, while below allof these parts will extend through the framework, from endto endthereof, the usual eam-shaft,controlling the operations of the severalparts.

In the preferred construction, which is illustrated herein, the turretmechanism embodies a turret slide or support (designated in a generalway by S (which may be supported in any suitable manner on a carriage,such as O,mounted on the bed B or framework proper, a turret (designatedin a general way by T) supported for rotation on the turret-slide S andhaving a circuit of lock-notches or stopfaces concentric with the axisof rotation of the turret, a turret-locking device, such as L, supportedfor reciprocation on the turret-slide at one side of the axis ofrotation of the turret and in positionto engage successivelythestop-faces of the latter, a reciprocatory turret-rotating device, suchas R, and actuating means for reciprocating the slide and for alsoreciprocating the turret rot-atin g and locking devices relatively tosuch slide.

The turret-slide will be of the usual type, supported and guided betweenways on the carriage O, and need not be described in detail. The turretT, except as to certain features hereinafter more fully specified, mayalso be of any desired construction. In the present case it has in theunder side thereof a recess, such as 4, of a suitable depth and diameterfor permitting the operation of the several turret rotating and locking.parts. This turret may be pivotally or rotat-ively supported on theturret-slide on a tapered or conical stud, such as 6, passing through acorresponding tapered longitudinal bore in the turret and bolted at itslower end to the turret-slide, the turret and the slide being heldtogether substantially in the usual manner by means of a nut 7,. carriedon a threaded portion of the upper end of the stud G, asuitable washer,such as 7, being interposed be tween the nut 7 and the turret andengaging the upper face of a notched or flanged portion 6 of the stud.All of these parts are substantially of the' usual type.

The turret itself, by which the different tools are carried foroperating upon the stock, is of novel construction, and instead of beingof substantially the same diameter from the upper to the lower endthereof it has a central peripherally-reduced portion, such as S",supporting'two tool-receiving portions 8 and 8 of relatively largediameter, each of these tool-receiving portions having the usual radialsockets 12 and 12, carrying tool-holders,

such as 13 and 13'. For the purpose of fastening these tool-holderssecurely in place, as illustrated herein, (see Figs. 1 and 2,) separateclamping means or holding devices,such

as 11 and 11, are employed, the clamping members for each-circuit oftool-holders being separate from and adjustable independently of thosefor the tool-holders of the other circuit. By means of this constructionit will be apparent that the clamping members may be passed into thetool-receiving portions substantially in a vertical direction andtransversely to the plane of each circuit of toolholders and that anytool-holder of one series may be adjusted in position or removed withoutaffecting the adjustment of any other tool of either circuit. The spacebetween the two receiving portions should of course be of sufficientheight to-permit the clamping members 11 to be operated readily andshould also be of sufficient radial depth to provide ample space for theholding members.

In the construction illustrated there is secured to the turret, withinthe recess 4 thereof a stop-ring 108, having a series or circuit of,stop-notches, such as 109, located at suit able intervals, these notchesbeing undercut or formed in the lower face of said ring 108, they beingin the present case five in number and concentric with the axis of theturret.

For the purpose of effecting the intermittent rotary movements of theturret there is shown, in connection with the reciprocatoryturret-rotatin g device hereinafter referred to, a circuit of members orpins cooperative with such actuating devices and forming therewith apawl-and-ratchet mechanism controlling the rotation of the turret. Inthis construction there are five of these pins, each of which may be ofthe type shown at 10, they being disposed concentrically about the axisof the turret and dependinginto the recess 4, with their lower faces ina horizontal plane below the plane of the upper walls of the stopnotches109.

As before stated,the tu rret-slide carries tu rret rotating and lockingdevices which may be of the type indicated at R and L. Theturret-rotatin g device coacts with the pins 10 and forms therewith thepawl-and-ratchet mechanism just referred to, while the locking device isin the nature of a lock-bolt adapted to ret T, this guideway beingpreferablya groove or channel in the upper face of the slide.

For the purpose of guiding the turret-lockingbolt L and for retardingthe unlocking movement ofsaid bolt the guideway or groove 14 in theturret-slide is preferably tapered, the forward end being of less widththan the rear end thereof, and the bolt L may be disposed between twoelongated tapered jaws or guides, such as 23 and 24, interposed betweenthe outer faces of said bolt and the outer tapered walls of theguideway, said jaws or guides being held in frictional engagement withthe opposite faces of the bolt, preferably by means of spiral springs 25and 26, lying between the innerends of said jaws and a portion of theturret-slide S, the slide being recessed at 27 to receive said springs,as shown clearly in Fig. 8 of the drawings. These springs force the jaws23 and 24 forward and cause them to grip the opposite faces of thelocking-bolt L, the advancing and transverse movements of the jaws beinglimited, preferably, by stops, such as the screws 28 and 29, extendingthrough the forward end of the slide S and bearing at theirinner endsagainst the forward ends of said respective jaws.

In connection with the bolt L there is pro vided a spring, such as 30,seated in a horizontal groove 31 in the slide S and bearing at itsforward end against the rear end of the bolt and at its opposite endagainst an adjustable tension device, such as the adjusting screw-bolt32, extending into the groove 31 at the end of the slide S.

The reciprocatory turret-rotating device R is supported in this case ina longitudinal channel or recess in the turret-slide at the oppositeside of the aXis of the turret from that at which the locking-bolt iscarried. In this case said actuating device embodies a turret-rotatingslide 17, suitably held in a guideway at the bottom of the opening 14:,and this slide has rising therefrom a fixed projection or stud, such as17', the upper end of which may be rounded to form a pivot for theactuating member or pawl proper, (indicated by 18.) At the forward endthereofthe actuating member or pawl 18 is recessed to form afeed-pin-engaging face corresponding in contour to the periphery of eachpin 10, this pawl also having a cam-face projecting above the mainportion of the pawl and so shaped as to permit the pawl to return to itsnormal position after having actuated a pin 10 to the position shown inFig. 8. In

lIO

the present case this pawl is normally springpressed into engagementwith one of the pins 10, a suitable spring for this purpose being shownat 19.

The slide 17, like the bolt L, is intended to be reactive in onedirection and will also have a suitable spring foreffecting suchmovement. The reactive movements of these two devices are in oppositedirections, however,for whereas the lock-bolt is intended to be normallypressed to the left by means of its spring, as seen in Fig. 8, the slide17 will be shifted to the right by its spring. This will be apparent byreferring more particularly to Fig. '11, in which there is illustratedat 20 a spring surrounding an adjusting screw-bolt 21 and workingagainst the inner back wall of a tubular member or guide, such as 22,resting against the stud 17. The movement of slide 17 to the left duringa part of the reciprocation of the slide S in the same direction will becaused by the contact of the wall of the recess 14 with the stud orprojection 17. When the slide S returns to the right, the movement ofslide 17 therewith will be arrested by the stop or abutment 33, and thepawl 18 being then held stationary will rotate the turret by engagingwith one of the pins 10 thereof during the last period of thereturnmovement of the turret-slide S.

For unlocking the turret the pawl L is 0perated in substantially thesame manner as has just been described with reference to the member 17.The reciprocatory turret-rotating device is arrested by a resistanceblock or stop, the stop 33 being employed in connection with the slide17, as above mentioned, while a corresponding stop, such as 34, on thecarriage constitutes the resistance-block for the locking device. Thisstop 34 may be an adjustable one having a wedge-shaped base working in acorresponding guideway in the carriage and will be adjustable inposition in some suitable manner, as by means of the adjustingscrew-bolts 35 and 35. This stop 34 is disposed in the path of movementof an intermediate supported on the turretslide S, this intermediatebeing in the present case a two-part or by-pass lever or pawl pivoted inan opening, such as 36, in the slide S and having its lower enddepending into the path of the stop 34. This by-pass lever is designatedby 37, and the upper end thereof projects into an opening 38 in thelockingboltL and is intended to engage the stopwall 39 to actuate saidlocking-bolt to release the same. When the turret-slide moves to theleft, the lower part 37 of the by-pass 37 will swing freely and willpass over the face of the stop 34 without actuating the upper part 37"of said lever; but when the turretslide returns to the position shown inFig. 10 the arm 37 will become efiective as soon as it strikes theleft-hand end of the stop 34, and the movement of the slide continuingthe upper end 37 of said lever 37 will swing ical recess at the end ofthe pawl 18.

to the right and will actuate the locking-bolt L in the same directionand will release the same from the locking-notch in the ring 108, thismovement being effected, of course, in opposition to the thrust of thespring 30.

The movement of the turret-slide toward its advanced position may belimited in any suitable manneras, for instance, by an ad justable rod 8,which may be held in place by a clamp-bolt 40.

For bracing the turret rigidly an overhanging arm, such as 41, may beused, it being clamped to the turret-slide and having at its free end abearing for the upper journal portion 6" of the 'stud 6, a nut, such as42, being employed for maintaining the parts in position.

Any suitable means may be employed for automatically actuating theturret-slide to advance and retract the same; but in this case acam-wheel, such as W, is carried by the usual cam-shaft 3, saidcam-wheel having thereon suitable cams, such as 43 and 43',

v forming between them a cam groove or channel adapted to receive asuitable member carried by the turret-slide. In this instance theredepends from said slide a stud, such as 45, the lower end of whichconstitutes ashoe and is of such a size as to exactly fill the camgroovein the wheel W, and thereby be positioned positively in itsreciprocation,and with it, of course, the turret-slide itself. The shapeof these cams will of course determine the rate and extent of advanceand withdrawal of the turret-slide, while the stops 33 and 34 willdetermine the points at which the turret will be rotated and thelocking-bolt withdrawn from the notch 109. Obviously as the turretslideadvances toward the work the spring 30 will maintain the locking-bolt inlocked engagement with the ring 108 and the by-pass 37 will ride overthe stop 34 and will not be effective, while during a part of thismovement the slide 17 will be held against the stop 33 by the expansionof the spring 20, and that pin 10 which will next serve to transmit a1'0- tary movement to the turretwill ride over the cam-face 18 and willdrop into the con- When the turret-slide is retracted, however, the arm37 of the by-pass 37 immediately comes into engagement with the stop 34,and as the pivot of the lever is shifted to the right, as seen in Fig.10,by the continued retractive movement of the turret-slide the upperend of the arm 37 will withdraw the locking-bolt quickly from the notch109, owing to the fact that the movement of the end of the arm 37" is'substantially twice that of its pivot. As soon as the locking-boltwithdraws the pawl 18 will become effective to rotate the turret, owingto the fact that the slide 17 is then in engagement with the stop 33,and hence by its resistance to movement in the direction of the returnof the turret-slide will cause the partial rotation of the turret byengagement with a pin 10. At the end of this movement the parts will beleft in the positions shown in Figs. 8, 10, and 11.

The rate at which the turret and its slide advance and withdraw isdetermined inthis case not only by the shape of the cam-faces of thecam-wheel W, but also by the rate of rotation of the shaft s,which, asbefore stated, is intended to be operated either at a high or a low rateof speed. For this purpose I have illustrated at 50 a driving-belt whichmaybe rotated continuously from the usual countershaft (not shown) andis intended to drive either one of a pair of pulleys 51 and 52 as it isshifted from one to the other. The pulley 51in this case is fast onaworm-shaft 53,

journaled at one end of the main frame A, while the pulley 52 is looseon said shaft and carries a planet gear or pinion, such as 54, adaptedto mesh with the sun-gear 55, fixed on the shaft 53, and also withanother gear 58, which, although of the same diameter as the sun-gear55, has one tooth less than the same. The gear 58 is rigidly secured toa ratchet-wheel 58, which is loose on the shaft 53, and a stop-pawl,such as 59, may be employed for preventing a retrograde movement on thepart of the gear 58, the pawl being mounted in this case on a bracket59, projecting from the framework, this mechanism forming an-epicyclictrain for imparting either a high-speed or low-speed movement to theworm-shaft 53, and hence to the cam-shaft s, which carries thereon aworm-gear 57 ,in mesh with a worm 56 on said shaft 53. This mechanism isnot by itself considered a part of our invention.

As it is intended that all of the operations of the machine shall beautomatic, there is provided a belt-shipper, such as 60, pivoted on thebracket-arm '59 and having the usual fingers for shifting the belt 50from one to the other of the pulleys 51 and 52 alternately. In order tooperate this belt-shipper, there is provided on the cam-shaft s acam-wheel 61, having a circuit of peripheral cam-faces, formed in thiscase on cam segments or wipers 62, preferably removably secured to thecamwheel 61 at different intervals. As the camshaft rotates thesecam-faces will alternately shift the belt-shipper first-in the onedirection and then in the other and correspondinglyoperate the belt, andthus vary the rate of operation of the driving mechanism, the speed ofrotation of the cam-shaft,'and the feed movements of the several toolsand driven parts. These cams 62 'coact with a stud or pin on thebelt-shipper. It will be seen also that the cam-faces of the earns 62are so arranged in two sets as to automatically shift the belt-shipperwhether the cam-shaft be rotating in the one or the other direction.Near the opposite end thereof this cam-shaft carries in this caseanother cam-wheel, such as WV, for controlling theoperation of the rodgripping and feeding spindle supported on the head-stock of the machine.This headstock is indicated by H and is substantially of the usualconstruction. It supports also substantially in the usual manner aplurality of composite live spindles or rod feeding and rotatingspindles, preferably two in number and each preferably of theconstruction ill ustrated in detail in Fig. 6. The two spindles aredesignated, respectively, by r and r, and each is made up, as is usual,of two spindles, the intermediate of which is designated by 65 andisjournaled substantially in the usual manner in auouter spindle, such as67, while the inner spindle, which engages the rod directly, isdesignated by 66. The spindle 65 carries at its working end the usualchuckjaws 68 for holding and clamping the rod when the latter is to berotated, and the corresponding end of the spindle 66 is also split to,form spring arms or jaws 69 of the usual type. At the chucking end ofthe spindle 65 the sleeve 67 carries a conically-bored collar, such as 7O, to form an inclined resistance-surface for operating the members ofthe chuck 68. At the rod-receiving ends thereof each of the spindles 65and 66 carries the usual grooved collar, the inner spindle having itscollar 71 secured to the extreme end thereof, while the outer spindlehas its collar 72 splined thereon in substantially the usual manner forsliding movement, the conical or cam faces of the collar coacting withthe usual levers 73 for clamping the spindles together.

For the purpose of operating the two collars of each composite spindleback and forth we make use in this case of a pair of slides, one ofwhich (that shown herein at 75) controlling the movements of the twocollars 72 and 72, while the other is indicated at 76 and is adapted tooperate simultaneously the collars 71 and 71 in the usual manner. Thetwo slides 7 5 and 76 are mounted in suitable guides on the framework atthe receiving end of the machine and will have depending members orstuds, such as 77 and 7 S, coactin g with suitable cams on the cam-wheelW, which cams of course will operate the slides at the proper points.

A manually-operated actuator is provided for each of the slides 75 and76, whereby said slides may be independently adjusted during the settingup of the machine for making any particular kind of work. Although anysuitable device may be employed for this purpose, we prefer to provideeach of the slides with a short rack or section of teeth, (desig nated,respectively, by 101 and 102.)

As will be observed by reference to Fig. 13,- each of the slides 75 and76 has a base portion shaped to fit one-half of the channel-shapedspectivel y, in the slides, and loosely journaled on said stud, one ateach reduced end thereof, is a pinion 106 107, respectively, saidpinions intermeshing with the racks 101 and 102 and each having a hubequipped with a suitable crank or handle (shown by dotted lines) formanipulating the same when it is desired to adjust either or both of theslides by hand. It will therefore be seen that mechanism is providedwhich includes a power-operated actuator for the slides and 76 and ahandaetuated actuator for the same slides, whereby during the successiveoperations involved in running the machine and in setting up the samefor any particular kind of work both of these devices may be broughtinto use and jointly cooperate to enable the operator or machinist tomanage the machine con veniently and effectively.

In connection with the composite spindles of the machine we have alsoillustrated at P a standard or post having thereon a pair of rodguidesof any usual type, (indicated by 79 and 79'.) The spindles r and r maybe retated in any suitable manner; but in this case the outer spindle ofeach of these composite spindles has keyed thereto a gear-wheel which isintended to be rotated by a gear or pinion supported on a shaft separatefrom these spindles. The two gears on the spindles may be spur-gears,such as those shown at 80 and SO, and these two gears may be rotated inthe same direction by an idler, such as 81, supported on a stud 82 anddriven by a pinion 83, secured to a driving-shaft 84:, carrying a fastpulley 85 and a pair of loose pulleys 86 and 86, controlled by twooppositely-running belts 87 and 87, the movements of which willbe'governed in the usual manner by means of a belt-shipper, such as 88.

It will be apparent that the direction of rotation of the spindles maybe reversed quickly by shifting the belt-shipper. This belt-shipper willusually-be pivoted on the framework at some suitable pointas, forexample, at 88, (see Fig. 1)-and may be controlled in itsmovementsautomatically byasuitable poweroperated part-such, for example,as the camwheel to on the cam-shaft 5, said cam-wheel having twocam-segments 9O thereon cooperative with a pin or finger 88 on thebelt-shipper. (See Figs. 1 and 3.)

By operating the spindles from a drivingshaft at one side of suchspindles practically all of the strain of the belt is removed from thework, and the rods as they are fed through the machine and up to thetools will be located in position with much greater precision than as isthe case when the feed-spindle is subjected directly to the pulls andstrains of a driving-belt passing therearou nd. Moreover, by thisimproved construction the work-feeding spindles may be broughtelosertogether than is ordinarily the case and a more compactorganization of the parts therebysecured.

For the purpose of turning down the stock and cutting off thepartially-finished articles we may employ the usual turning-down orcutting-off tools, such ast and t and c and 0,

supported in the ordinary manner by tool-,

ing at their upper ends actuating members for engaging and shifting saidtool slide. These actuating parts may be adjustable and will preferablybe screw-bolts, such as 91 and 91. At their lower ends the lovers 190and 190 cooperate with a cam-wheel, such as 10, carried by the cam-shafts and having thereon suitable cams governing the movement of these twolevers, and hence the operation of the tools. In this instance thiscam-wheel has cams on both sides thereof, the cams on one side coactingwith the lever 190 and those of the other side with the lever 190. Thedifferent cam members are designated herein by 92 92', 93 93, 94 94, and95 95. For the purpose of regulating the movements of the toolslide, andhence the throw of the tools, certain of these cams maybe madeadjustable, in this case the two cams 93 and 93 being so shown.Preferably these cam segments, which of course will have the usualperipheral camfaces,will coact with the levers 190 and 190and will beadjustable toward and from the axis of the cam-shaft s. The adjustmentmay be effected in any suitable manner as, for instance, by passingclamping-serews through substantially-radial slots in thesecam-segments, the points of the screws or bolts, such as shown at 96,Fig.12, passing into the face of the cam-wheel 20. It will be apparentthat by loosening these bolts and the screw the cam-segments maybeadjusted to anydesired position and the throw of the'levers 190 and 190correspondingly varied.

Obviously the cam-wheel 10 need not necessarily be provided with camsfor automatically shifting the belt-shipper 88 when working on stock toform articles in making which the reversal of the rotation of thespindle is not necessary. As it is desirable, however, to reverse therotation of these spindles when forming screws and similar articles,cams 90 have been illustrated in connection with the cam-wheel to, butthese cams, it should be understood, should be removable ones, asillustrated in Fig. 3.

By providing for variable throws of either one or both of thetool-slide-aetuating lovers the machine is adapted to have a wide rangeof usefulness in connection with stock of different sizes, and this isincreased by the provision of the means hereinbefore described forautomatically varying the rate of rotation of the cam-shaft s atdifferent points in a single cycle of rotation of the latter, whereby ofcourse the rate at which the turningdown and cutting-off tools may beoperated will be governed by the speed at which the cam-shaft turns.Hence the operation of all of the tools and parts being dependent uponthe action of this cam-shaft the manner in' which the different toolswill cut the stock and the degree of speed of operation will be variedautomatically at the proper times, in accordance with the shape of thecams carried by the shaft 8 and the speed with which the latter isoperated by the worm-shaft.

As the automatic machine illustrated in the drawings of this applicationmay be used for a great variety of different purposes, it is believedthat a more detailed description of the operations of the several partswill be unnecessary, as the action of the several mechanisms notreferred to more particularly herein is substantially similar to that ofcorresponding mechanisms heretofore used.

Having described our invention, we claim 1. The combination, with aturret, of a reciprocatory turret-supporting device; automatic means foroperating said turret-supporting device; a reciprocatory slide having astud or projection; a pawl carried by said stud or projection, said pawlserving to rotate the turret on the retractive movement of theturret-support; and a stop for holding said reciprocatory slidestationary at a predetermined point in the retractive movement of theturret-supporting device.

2. In a machine of the class specified, the combination, with multiplespindles for holding the work, of means for automatically actuating saidspindles; a turret support; a cam-shaft having a cam for automaticallyoperating said turret-support; means for automatically actuating saidcam-shaft and for driving the same at diiferent speeds; a turret havingtwo separated tool-receiving portions mounted for rotation on theturret-support; a slide having a stud or projection movable with saidturret-support; a pawl pivoted to said stud or projection; a stop forrestraining the movement of said slide at the proper time; aturret-locking device also movable with the turret-support; a device forpositively actu- 4. The combination, with a turret, of a turret-support;a reactive slide carrying a stud having a turret-rotating device movablewith said turret-support; automatic means for op erating theturret-support; and a stop cooperating with the slide carrying theturret-rotating device.

5. The combination, with a turret, of a turret-support; a slide having astud carrying a turret-rotating device; a turret-locking device;automatic means for operating the tur-' ret-support; means for actuatingthe locking device; and means for operating the slide carrying theturret-rotating device by and. upon the retractive movement of saidturret-support.

6. The combination, with a turret, of a turret-support; a slide carryinga stud on which is mounted a turret-rotatin g device, said slide beingmovable with the turret-support; a stop on the frame with which saidslide engages during the refractive movement of the turretsupport; aturret-locking device movable with the turret-support; a lever foractuating said turret-locking device; a stop with which said leverengages; and automatic means for operating the turret-support.

7. The combination, with a turret, of a turret-support; a slide having astud carrying a turret-rotating device; a turret-locking device carriedby said turret-support, the turret rotating and locking devices beingdisposed at opposite sides of the axis of rotation of the turret; andmeans for automatically operating the turret-support, theturret-rotating device and the turret-locking device.

8. The combination, with a turret, of a recessed turret-support; a slidehaving a vertical stud or projection located in the recess of saidturret-support; a, pawl carried by the stud or projection of said slide;a stop on the frame, for arresting the movement of said slide; andautomatic means for operating the turret-support.

9. The combination, with a turret, of a turret-support; a reciprocatoryslide carrying a projection having a turret-rotating device movable withsaid support; a turret-locking device carried by said support andmovable relatively thereto; automatic actuating means for operating theturret-support; and separately-operable actuators for the turretrotating and locking devices.

10. The combination, with a turret, of a turret-support; a reciprocatorylocking device carried bysaid support and movable relatively thereto; aslide reciprocatory on and relatively to the turret-support; a verticalstud on said slide; a tnrret-rotatin g pawl supported for oscillation onsaid stud; and automatic actuating means for operatingtheturret-support, the turret-locking device, and the reciprocatory slide.

11. The combination, with a turret, of a recessed turret-support areciprocatory turret locking device carried by said support and movablerelatively thereto; a spring-retraeted turret-rotating slide having astud or proj ection reciprocatory on and relatively to theturret-support; a turret-rotating pawl supported for oscillation on thestud or projection of the turret-rotating slide; and automatic actuatingmeans for operating the turret-slide, the turretlocking device, and theturret-rotating slide.

12. The combination, with a turret having recesses, of a turret-support;a spring-advanced reciprocatory turret-locking device carried by saidsupport and movable relativelythereto; a spring retractedturret-rotating slide reciprocatory on and relatively to theturret-support, said slide having a stud or projection; aturret-rotating pawl supported for oscillation on the stud or projectionof the turret-rotating slide; and automatic actuating means foroperating the turret-support, the turret-locking device, and theturret-rotating slide.

13. The combination, with a turret, of a turret-support; a reciprocatoryturret-locking device carried by said support; a by-pass device carriedby the support for operating said turret-locking'device; an actuator forsaid by-pass; a movable turret-rotating device having a stud orprojection; a pawl carried by said stud or projection; and means forarresting the movement of said turret-rotating device upon theretractive movement of the turret-slide.

14:. The combination, with a turret, of a turret-support; areciprocatory turret-locking device carried by said support; a by-passdevice carried by said support for operating said turret-locking device;a stop in the path of movement of the bypass and operative for actuatingthe latter; a movable turret-rotating device having a stud; a pawlpivoted to said stud; and a stop for arresting the move ment of saidturret-rotating device at a predetermined point in the retractivemovement of the turret-support.

15. The combination, with-a turret having tool-receiving portions oflarge diameter and an intermediate recessed portion of small diameter,the portions of large diameter having sockets, of adjustabletool-clamping devices located in the tops of said tool-receivingportions, the lower tool-clamping devices projecting into the recessedportion of the turret whereby they are readily accessible when it isdesired to remove or adjust the tools.

cessed turret-support; a tu rret-rotating pawl carried by a projectionon a slide disposed in the recess of the turret-support; a springcooperating with said projection; a stop with which said slide engages;a cam having a groove; a shoe on the turretsupport working in saidgroove and adapted thereby to locate the turret-support positively inits several 16. The combination, with a turret, of arepositions duringthe reciprocation of said support; and means for actuating the cam.

17. The combination, with a support, of a cam-shaft and means foractuating the same; a rotary spindle; a chuck; a rod-feeding devicecooperatin g with the spindle and chuck; means for automaticallyactuating said rodfceding device and said chuck; manuallyoperated meansseparate from but in engagement with said rod-feeding device forindependently actuating the rod-feeding device; a tool-slide mounted onsaid support for reciprocation transversely to the axis of rotation ofthe cam-shaft and the spindle; an actuating-lever for shifting saidtool-slide; and a cam on said cam-shaft and adjustable toward and fromthe axis of the latter and cooperative with said actuating-lever.

18. In a screw-machine, the combination, with a blank-carrying spindle,a chuck, and rod feeding devices mounted therein, of means forautomatically actuating said devices, and independent means separatefrom said rod-feeding devices for manually operating said devices whendesired.

19. In a screw-machine, the combination, with a blank-carrying spindle,a chuck, and rod feeding devices mounted therein, of means forautomatically actuating said chuck and rod-feeding devices, said, meansincluding slides, and a manually-actuated device separate from therod-feeding devices for independently operating said slides whendesired.

20. In a screw-machine, the combination, with a spindle and rod chuckingand feeding devices carried thereby, of slides connected with saiddevices; means for automatically actuating the slides; and meansseparate from but in engagement with the slides for manually actuatingthe slides when it is desired to impart a movement thereto independentof the automatic action of the machine.

21. In a screw-machine, the combination, with multiple spindles and rodchucking and feeding devices carried thereby, of'a slide connected withthe rod-chucking devices; a second slide connected with the rod-feedingdevices; means for automatically actuating said slides at the propertimes; and means separate from but in engagement with the slides formanually actuating either of said slides when it is desired to effect anindependent adjustment thereof.

22. In a screw-machine, the combination ism and rod chucking and feedingdevices carried by said spindles, of two slides; a channeled guide-barprojecting from the frame on which said slides are fitted; a stud orspindle mounted in said guide-bar; and manually-operated means carriedby said stud or spindle for effecting an independent adjustment of theslides when desired.

23. In a screw-machine, the combination,

1 2 a with multiple spindles arranged in parallelwith multiple spindlesarranged in parallelcarried on the ends of said stud or spindle IO ismand rod chucking and feeding devices for engaging with the teeth of theslides; and 7 carried by said spindles, of a channeled 1 means formanually actuating said Wheels. uide-bar projectin from the frametwo'lides connected, respectively, With the rod LOUIS WOERNER' chucking andfeeding devices and movable I FRANK HARRINGTON upon said channeled bar,said slides being Witnesses: provided with teeth; astnd orspindlefixedly HENRY BISSELL,

mounted in the guide-bar; toothed Wheels GEORGE A. HOFFMAN.

